Safety catch



Feb. 8 1927.

1,616,964 J. FlELDlNG ET AL SAFETY- CATCH Filed Nov. 21. w25

Y arm extended.

Patented eb. S, 192.7.

narran ereres iddtl JOHN risentire, or NORTH rnovrnniien, Ann Jos'nrn P. wnrrannnyor Yai#empreint,

Y nnonnrsnannr a; 1

SAFETY CATCH.

Y Application filed November 21, 1925.: SerialNo. 70,1606.

This invention relates to an improved con:

struction of safety catch for pin stems, more' i and the keeper being provided with a memv ber or portion extending into said. groove. to increase the vinner and outer bearing surfaces of `the keeper and to supportv ther keeper against spreading and becoming'disengaged 'trom its mounted position Iin the body when under an excessive opening strain. y f

A -further object of the yinvention vis the provision of a. peripheral bar bridging'the space between the ears oie tbevbod'y member:

and the provision of a plurality of peripheral radial protuberances on the keeperA located so as to cooperate with vthe bar to re? 'leasably retain the keeperin eitheropen or closed position. i' Y i Vith these and other objects-in view,.the invention consists of certain novel features ot construction, as will be more fully vdev- Scribed, and particularly'pointed outt in the appended claims.

In the'accompanying,drawing:A r Figure l is a sideelevation `oli our iinproved safety catch as applied to a base retaining'the'pointed end "of thelpin stem.

VFigure 2 is a blank v.showing the body member in extended position slotted throughl its ears andtshowingy the peripheral bridging -Y Figure 3 through the blank shown in Figure 2. i

Figure l is a side elevation of the rotaryx keeper membenf i i Figure 5 ure Il. i

Figure 6 shows the body member as having been partially bent up from the base to form side ears, said ears being spread suili'- ciently to permit positioning of the keepe on the trunnion. Figure 7 shows the ears-of the body member as having been closed into operating position'.

Figure 8 is a side-elevation illustrating the ears of the bodyv and the keeperfas hav-v ing been slotted radially to receive a .pin

is a centralv sectional: vievvv is a section ,on line 5 5 of Figi stem also. shoivingthe protuberances on' Ythe keeper, onev'positioned `to retai'nthe keeper 1n open position. t'

Figure f9 isa seetionon line 9-, `9 of Figure 7, showing-the keeper-in cl-ofsedposition and the protuberances 4thereongas having been'sprung` past the'bridge memberfto rev leasa'bly retain `the'keeper'i'n closed position;

It is found in the practical construction andro'peration of safety vcatchesfof thisjchar-Y acter, of advantage toprovide a trunnion extending acrossA or bridging the space be- Ytween kthe ear members of the lebody, and -to A mount'thel keeper member on this tr-unnion; also to .provide 'an annular groove in the inner face otfone` of the ears andtoprovide an arcuate flange on the keeper extendinginto'v this grooveywhich structure performs two' functions ;'frst it provides an' extended bears'.` ing surface forthe'keeper .and second, it also serves to prevent the keeper from spreading undera radial strain, and, ftherejfore',pro vides a safety catch ofqthis character with increased strength*y `and l addsfmaterially to its' essential element of safety which` islto preventl the undoing of the catch and the consequent loss vof thev brooch'or valuable pin to Which-it is attached; and the follow'l ing is a detailed desoriptionof the present embodiment of our invention' and showing one construction of safety -catch by whichv these advantageous results maybe accomplished-v er vi i .With reference to the drawings, 10jdesigknat'es the opposite side ears of thebody member of the catch, which are bent up from the base portion" 1l. One Aof-theseears, isy hereinshovvn asbeing provided with a so# called vtrunni on member ,'12 Y which extends across to` bridge the space ,betweenthe ears Whenin operating positionl One of these ears, preferably :one

carrying the trunniom is providedvvith' anannular` groove,"undercut ory recess 13 in'its inner facej' j- 1 f d Y 'Y v On this trunnion 12 4is rotatably mounted aso-called keeper member 14 which has'a central opening 15 vto fit onto the 's trunnion 12,k andthis keeper Vvmember isprovided ears 10 ofthe body vmember are closed their other, as bestillustrated in Figurei'll After.

With a laterally extending arcuate'flange ,or 105` vprojecting portion/16 Whichextendsinto the Y vcorresponding groove 'lfafter which the these members have been thus yassembled the operating handle 17 of the keeper member is rotated into the position illustrated in stern.

When it isv desired to close this radial slot to retain the pin stem therein, it is only necessary to swing thehandle 17 into the positionV illustrated in Figure 9.

-It lis` found of advantage to provide simple and edective detent means for releasably retaining the keeper either when in openor in closed position `and to accomplish this in a simple and effective Way, We have provided a peripheral cross Abar .2O which extends across between the ears of the body and ,We lhave provided protuberaneesl and 23 on the periphery of the keeper. These protuberances being so located as to pass beneath' the bar .2O in the handle 17 as the keeper is moved to open position and when moved to closed `position the protuberanee Q2 swings past the vbar 2O to retain the handle in that position.

Itis found in practice of :advantage to place this peripheral bar Q0 in such position as `to prevent the operatingl handle 1i' from dropping dovvn onto the base Q8 durinO the soldering yoperation so as to keepit out of the Way While the body is being soldered to the base 23 thereby preventing 4the handle from also vbeingsoldered and vs0 4fixed in this posi--` tion.v t Y. Y

`Our improved safety catch is very simple and practical in -construction and is effective in its operation and by the provision of a laterally-extending flange which projects into l the annular groove in the face cof the body, the keeper is eifectually prevented LThe foregoing description fis directed Y solely towards the construction illustrated,

but We desireV it to rbe understood that ive the reserve the privilege of resort-ing to all the mechanical changes to which the device is susceptible, the invention being defined and limited onlyV by the` terms of. the appended claims. Y

Vile claim: Y 1.Y A safety catch comprising a body member having a pair of spaced side ears, a trun` nien on one of said earsy bridging said space, the inner face of one of said ears having an annular lgroove, and a rotary keeper 'operavided With an arcuate groove grooved, and a keeper member rotatably mounted on said trunnion and a projecting portion carried by said keepercxtending into said. groove toA increase its bearing surface, saidkeeper member being slotted to register with the slet in the body Iears in one of its positions of rotation.

3. A. safety catch comprising` a body member having a pair of spaced side ears, a trunnion carried by one of said `ears and bridging said space, said ears Vrand trunnion being` radially slotted to receive aA pin stein, the inner face of the ear carrying the tran-- nion being provided With an annular groove about the Vtriinnion' portion, said slotted keeper member being rotatable in said ytruniiion and having an arcuate flange extending into said `groove whereby the inner and outer liearingsurfaces of the `keeper are increased and the keeper is supported against spread-- ing` under a .radial strain.

4. .A safety catch comprising` a body meniber 'having a pair of spaced slotted ears, a: peripheral bar bridging the space between said ears,A a slotted keeper rotatably mounted between said ears having an operating handle, a plurality of peripheral radial gprotuberances on said keepers@ located as to either `in `open or closed pesi# JOHN FinLniNG; .iosiirii r. Wit-tirannia "cooperate with said `bar to releasably .retain 

